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热带鸟类更偏好红色和黑色的水果

摘要 : 中国西双版纳热带植物园的表的一项研究发现,在选择水果时,热带亚洲鸟似乎更喜欢红色和黑色水果。这些颜色是主要由鸟类传播种子的水果中最常见的颜色,因此这些发现表明,水果颜色在某种程度上是为吸引鸟儿才形成的。相关文章发表于2014年7月17日的《Scientific Reports 》杂志上。
热带鸟类更偏好红色和黑色的水果

Rui-Chang Quan及同事对来自中国南方的四种食果鸟对五种不同颜色的人造和天然成熟水果的喜好进行了评估。人造水果是用苹果、梨、香蕉、小麦和玉米面的一种混合物做成的,被染成黑色、红色、黄色、绿色或蓝色,与所用天然成熟水果的颜色相匹配。他们发现,在野外捕捉到的和人工养育的鸟儿都对黑色和/或红色(这两种颜色在该地区最常见)有一致的、强烈的喜好,同时会避开不常见的颜色,如人造的和天然的绿颜色水果。

作者指出,与其他颜色相比,红色和黑色水果与实验中所用背景反差最大;他们同时也承认,对比度和颜色可能影响了他们的实验结果。然而,他们的发现支持以下假说:黑色和红色水果之所以常见,部分是因为食果鸟喜欢这些颜色。

原文摘要:

Bird fruit preferences match the frequency of fruit colours in tropical Asia

Qiong Duan, Eben Goodale & Rui-chang Quan

While many factors explain the colour of fleshy fruits, it is thought that black and red fruits are common in part because frugivorous birds prefer these colours. We examined this still controversial hypothesis at a tropical Asian field site, using artificial fruits, fresh fruits, four wild-caught resident frugivorous bird species, and hand-raised naïve birds from three of the same species. We demonstrate that all birds favored red artificial fruits more than yellow, blue, black and green, although the artificial black colour was found subsequently to be similar to the artificial blue colour in its spectral reflectance. Wild-caught birds preferred both black and red fleshy natural fruits, wheras hand-raised naïve birds preferred black to red natural fleshy fruits and to those of other colours. All birds avoided artificial and naturally ripe green fruits. The inter-individual variation in colour choice was low and the preferences were constant over time, supporting the hypothesis that bird colour preferences are a contributing factor driving fruit colour evolution in tropical Asia.

来源: Nature中文 浏览次数:46

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